Latch and lock mechanism.



wj a m G. N." ASON. LATCH AND LOOK mncmmsmn- APPLICATION FILED JUNE 28, 1910. 1,033,028; Patented July 16, mg.

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GHN. MASON. LATCH AND LOCK MECHANISM. APPLICATION FILED mm; 28, 1910.

Patented July 16, 1912.

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GEORGE N. MASON, OF READING, PENNSYLVANIA, ASSIGNOR TO READING HARD- WARE COMPANY, OF READING, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

LATCH AND LOCK MECHANISM.

Specification of Letters Patent.

rataten ma 16,1912.

. To all 'YU/IO'HL it may concern:

Be it known that l', Gnome N. Mason, a citizen of the United States, residing at Reading, in the county of Berks and State of Pennsylvania, have invented certain'new and useful lniprm'ements in Latch and Look Mechanism, of-which the following is a specification.

My invention relates to iniproven'ients in latch mechanisms and the object in the present instance'is to provide a simple and effective means for operating both the latch bolt and dead-locking bolt with a single key.

A further object isto provide means for operating the dead locking bolt from the inside of the door by means of a knob, which will overcome the necessity of using a key in the inside of the door but making both bolts capable of being operated from the outside by a single key.

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The invention is more fully described in the following sp'ceitictition and clearly lllllS- trated in the accompanying drawing, in

which Figure l is an edge view of a portion of a door with niy lock in position, showing the outside key operation and the inside knob operations. Fig. 2 is a plan view of the lock, with the cover of the casing removed, showingtl'ie latchbolt in protracted position and the dead bolt in retracted position. Fig. 3 is a like view with both bolts in protracted position. Fig. 4; is a like view with both bolts in retracted position, with the ope 'atingkey at the end of its second turn.

In the drawings ithe numeral 1 designates an ordinary lock casing; 2 is a spring backed latch bolt;,3 thedead locking bolt; 1} is a tumbler, pivoted on a pin 5 in the casing which pin passes through a slot in the dead bolt; thedead bolt is also formed with a h1g6 and a depression! in its upper face.

The numeral 8 designates a tumbler pivoted a i S to the casing, the pint projecting through slots in both the dead bolt and the tumbler l. The tumbler 8 is formed with an irregular opening 9.

lO'desiguates a pivoted lever backed by a spring 23 and formed with a lug ll thereon adapted to movein the opening $1 of the tumbler S.

The numeral 12 designates a shifting bar,

sio'ns 7 in limit of the opening 9 in thetumbler 3.

pivoted on the pin 8 and its upper extremity engages the latch bolt 2; The lever 10 is formed with a rounded lug it; on its.

upper edge and adapted to contact with the heel ll of this bar .when raised.

The tumbler t is formed with an upwardly extending projection 15 having a right angled end 16 which engagesa roll back 1'2; This-roll back is secured to a splndle 18 and is provided with a thumb knob 19 on the innerside ot' the look. The roll back when turned, engages the depressthe upper face of the dead bolt 3. rt spring backed bar 520, is pivoted to the inside of the casing and bears agahist the topof the roll back to keep it in full thrown position.

The action of the lock is as follows :Assuming the parts to be in position as shown in Fig. 2, to look the dead bolt either the knob 19 or the key may be turned; it the knob is turned, the roll back 17 will raise the arm 16 and with it the tumbler 4, thus releasing the (lead bolt -from its engagement with the tumbler through the lug 6;' the continued turning of the knob will cause the roll back to engage the depression 7 in the upper face of the dead bolt and move it out, to protractedposition, as shown in Fig. 3. If, however, the key is used to throw the dead bolt, that is, if the leek is operated from the outside, the turning of the key will raise the tumbler releasing the lug (5 and the continued turning of thekey will cause it to contact with the (lead bolt in the depression 21 and to throw the bolt to the position shown in Fig. in either case, when the dead boltis so thrown, the lug 22 on the under side of the dead bolt will contact with the lug 10 on, thelever 10 and depress it so that the lug It will go to the lower To retract the bolts from the inside o'l the door,v it is only necessary to turn the knobs; the latch as usual, operated by the main knob from either side, but in this construction, the dead bolt is operated by the turning of the thumb knob in the opposite direction fron'rthe one just decrihed and the action of the parts is similar. the roll back releases the (lead bolt from its engagement with the tumbler, through the lug 3, and further turning of the roll back will engage the other depression 7 in the bolt and retract it. When it is desired to operate both. bolts Bil from the outside, with the parts as shown in Fig. 3, the key is inserted and in turning, it willcontact with the tumbler 4, (after first contactingwith and passing the tumbier 8) raise it free from the lug 6 and then engage the depression 21 in the under face of the bolt 3 and retract it. While doing this, the lever 10 will be permitted to raise to the position shown in Fig. 2, by the lug 22 riding oil of the lug 10 and permitting the spring 23 to raise the lever until the lug 11 engages the offset 11 in the tumbler 8,

This will leave the dead bolt retracted but the latch bolt is still in protracted position. The continued turning of the key in the lock will however, at the beginning of its second revolution, again contact with the tumbler 8 and move itsuliicientlv to permit the lug 11 to enter the upper an narrower portion of the opening 9; this will bring the end of the lever 10 in the path of the key bit and the turning oi the key will raise the lever 10 and with it,through its contact-at the lug l3 and the heel 14E, shift the bar 12 around its pivotal point 8 and retract the latch bolt which is connected with said bar at its upper extremity, so that the parts will appear as shown in Fi 4:, which shows the key still in engagement with the lever 10, as just above described.

'What I claim, is

In combination, a casing having therein, a latch bolt, a slotted lock bolt, a pivot member located in said bolt slot, a lever pivoted at one extreme end portion to said pivot member and operably connected at its other end with the latch bolt, a tumbler pivoted to said pivot member and being disposed substantially at right angles to the lock bolt and having a shoulder an actuating lever pivoted at one end. to the casing and its free end being engageable with said first lever and tumbler shoulder when the lock bolt is retracted, and means on the lock bolt for holding said free end of said actuating lever disengaged with said first lever and tumbler shoulder when the lock bolt 1S protracted.

In testimony whereof I affix my signature, in presence of two witnesses.

GEORGE N. MASON. Witnesses Emir. KE LY, WM. XV. Fnr'rnn. 

